Consolidated Statement of Equity (Unaudited) (USD $) In Thousands	Total	Preferred Shares	Common Shares	Paid-in Capital	Accumulated Distributions in Excess of Net Income (Loss)	Deferred Compensation Obligation	Accumulated Other Comprehensive Income (Loss)	Treasury Stock at Cost	Non-Controlling Interests
Balance at Dec. 31, 2010	$ 3,134,687	$ 555,000	$ 25,627	$ 3,868,990	$ (1,378,341)	$ 14,318	$ 25,646	$ (14,638)	$ 38,085
Issuance of common shares related to the exercise of stock options, dividend reinvestment plan and director compensation	1,143		12	769				362
Issuance of common shares related to exercise of warrants	134,310		1,000	133,310
Issuance of common shares for cash offering	129,665		950	128,715
Contributions from non-controlling interests	281								281
Issuance of restricted stock	389		119	(6,284)		389		6,165
Vesting of restricted stock	$ (5,468)			$ 1,694		$ (1,926)		$ (5,236)
Stock-based compensation	3,156			3,156
Redemption of preferred shares	(180,000)	(180,000)		6,402	(6,402)
Dividends declared-common shares	(38,366)				(38,366)
Dividends declared-preferred shares	(25,263)				(25,263)
Distributions to non-controlling interests	(1,743)								(1,743)
Comprehensive loss:
Net loss	(24,572)				(21,060)				(3,512)
Other comprehensive (loss) income:
Change in fair value of interest-rate contracts	(6,926)						(6,926)
Amortization of interest-rate contracts	86						86
Foreign currency translation	(17,061)						(16,921)		(140)
Comprehensive loss	(48,473)				(21,060)		(23,761)		(3,652)
Balance at Sep. 30, 2011	$ 3,104,318	$ 375,000	$ 27,708	$ 4,136,752	$ (1,469,432)	$ 12,781	$ 1,885	$ (13,347)	$ 32,971